Dressed like a maid, Aiko is Caesar's loyal servant. Since Caesar can't stand micro-management of any sort, Aiko is also something of a confidant and secretary, keeping Caesar's affairs in order. Warm and affectionate, Aiko's love for Caesar is undying. She'll sacrifice everything if it means making Caesar happy; her obsession with Caesar is so severe that Nana, Caesar's other 'right-hand woman' of sorts, likes to joke that Aiko worships at the "church of Caesar", to which Aiko wonders if there really is such a church, and that she would most-definitely join up.